Potassium pyrosulfite(CAS#16731-55-8)

Chemical Property:

Molecular Formula	K2O5S2
Molar Mass	222.32
Density	2.34 g/cm3
Melting Point	190°C
Water Solubility	Soluble in water. Insoluble in ethanol.
Solubility	H2O: 0.1M at20°C, clear, colorless
Vapor Density	2.3 (vs air)
Appearance	White crystal
Specific Gravity	2.3
Color	White to slightly yellow
Odor	Odorless
Maximum wavelength(λmax)	['267nm(H2O)(lit.)']
Merck	14,7645
PH	2.5-4.5 (25℃, 0.1M in H2O)
Storage Condition	Store at +5°C to +30°C.
Sensitive	Air Sensitive
MDL	MFCD00167605
Physical and Chemical Properties	Colorless monoclinic platelets or white crystalline granules. The relative density was 2.34. Sulfur dioxide odor. Decomposition upon heating to 190 °c. Soluble in water. Slightly soluble in alcohol. Insoluble in ether. In case of acid decomposition to produce sulfur dioxide.
Use	Used as Chromatographic Reagents, developers, reducing agents and bacterial inhibitors

Send email to us

Product Detail

Product Tags

Hazard Symbols	Xi – Irritant
Risk Codes	R31 – Contact with acids liberates toxic gas R36/37/38 – Irritating to eyes, respiratory system and skin. R41 – Risk of serious damage to eyes
Safety Description	S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 – Wear suitable protective clothing. S39 – Wear eye / face protection.
WGK Germany	1
RTECS	TT4920000
FLUKA BRAND F CODES	23
TSCA	Yes
HS Code	28322000
Toxicity	LD50 orally in Rabbit: 2300 mg/kg

Introduction

It smells of sulfur dioxide. Sensitive to humidity. There is an acidic reaction. Sulfur dioxide escapes in contact with acid. It is gradually oxidized to sulfate in air and faster in humid air. If ground into powder, it can burn when it is hot. Easily soluble in water, insoluble in alcohol. Decomposition at 190 ℃. It’s irritating.

Previous: Sodium carbonate(CAS#497-19-8)

Next: Sodium benzoate(CAS#532-32-1)

Write your message here and send it to us